Deflection-indicator.



l. SCHWEISS.

DEFLECTIQN INDICATOR. APPLICATION FILED ra.21. gen.

Patented Aug. 28, 1917 JOSEPH SGHWEISS, OF ST. LOUIS, MISSOURI.

DEFLECTION I1\T DICATOR.

Specification of Letters Patent.

Patented Aug. 25, 1917..

Application filed February 21, 1917. Serial No. 150,058.

To all whom it may concern:

Be it known that I, JOSEPH Sonwnrss, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Deflection-Indicators, of which the following is a full, clear, and exact description, such as wiil enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates generally to tools and machines for metal working, and specifically to a testing device adapted for use in the various forms of machines, such as milling machines, for the placing, spot-ting or locating of the work in the machine in proper relationship to the tool which is designed to operate upon it.

As is well known in the art of metal working, various forms of machines are employed wherein the work is mounted on a work holder, and a tool is mounted on a chuck or tool holder in proper position for operation uponthe desired portions of the work. As the relative movement of the tool and the work is rendered automatic by the operation of the machine, it is essential, in order to insure the proper application of the tool to the work and the consequent proper forming of the latter, that the work be definitely and accurately located with reference to the tool and its axis of operation.

The device comprising my invention is designed as a test indicator which may be suitably mounted on the tool carrier so that the movement of the latter will trace the course of the tool relative to the work. A portion of the device is designed to make contact with a surface of the work throughout the movement of the tool holder, and from this cooperation of the device with the work, the relative position of the two is rendered evi dent to the operator through suitable indicating means. Such devices are not broadly new, and my invention consists essentially in a novel and improved form of device for accomplishing this operation.

It is the principal object of my invention to provide a device of the type described which is constructed so that its indicating portions may be in full view and readily ob served by the operator at all positions of the device when it is in use in tracing the intended contour.

A further object is to provide a device which is capable of very fine construction so that exceedingly nice and accurate work may be accomplished by it, and at the same time maintain such strength and simplicity in the construction as will render the instrument thoroughly practical.

Other objects will be obvious or pointed out hereinafter, reference being had to the accompanying drawings, in which Figure 1 may be considered either a plan or an elevational view of the device as it would appear mounted in a holder on a machine;

Fig. 2 is a longitudinal sectional view of the instrument; and

ig. 3 is a cross sectional view taken on the line 3-3 of Fig. 2.

The embodiment of the invention illustrated in these drawings consists in the first place of a tubular body portion 1 which tapers to its outer extremity from a larger generally cylindrical head portion 2. The body portion 1 is formed with a longitudinal tapering channel-way 4 which is closed for the most part by a plug or disk member 5. Fixed on this disk member 5 and located on the longitudinal axis of the body portion, is a pivot member 6. On one side of this pivot member, the disk member 5 is provided with an aperture 7 extending across more or less of the width of the channel 4: and providing space for the passage and operation of a rod 8. This rod forms one arm of a lever which is pivoted at 9 near the outer extremity of the body portion on pivot members 10, and the other arm of said lever is formed by a finger member 11 which extends out of the forward end of the body member and is curved or de fiected to one side thereof, where it terminates in a bearing extremity 12. When this lever is rocked or vibrated by manipulation of the finger portion 11, the rod portion 8 is oscillated in the aperture 7. Mounted on the head portion 2 is a cap member 14: which is in the form of a spider member with legs 15 which engage the head member 2 to hold the diaphragm portion 16 spaced apart from the head portion 2. On the diaphragm portion 16 is carried a pivot member 17 which is coaxially alined with the pivot member 6. Between and upon these pivot members 6 and 17 is rotatably mounted an indicator disk 18 which is spring-pressed in one direction by a light spring 19, which is attached at one end to said disk, and at the other end to the fixed disk member 5. At different points about its periphery, the indicator disk 18 is provided with indicating fingers in the form shown said connection bemg made by the end of the rod 8 passing through an aperture in the disk 18. The length of the slot 7 in the member 5 permits the desired extent of movement of this end of the rod 8 whenthe lever member of which it forms a part is rocked on its pivot formed by the pivot members 10. By virtue of this arrangementof parts, whenever the lever member is rocked by application of pressure to the finger portion 11, the indica tor disk 18 will be rotated on its pivot in proportion to the movement of the lever, and the degree of rotation of the disk may be observed byreference to the scales 21 Upon removal of theoperating pressurefrom the finger portion 11, the indicator disk is moved toward normal position by thelight spring 19.

In the" use of the device, the instrument is mounted in a suitable holder A which is carried on some movable portion B identified with the tool holding part of the machine. The piece of work which is being placed in the machine having been mounted on the chuck or work holder, the contact-member 12 of the instrument is brought into tactile association with the surface wh'ose contour is to vbe used as the guide for locating the work. I Then when the tool and work carrying portions of the machine are given the intended relative rotation, the instrument will trace along the test surface of the work so that any deflection of the latter from the proper working axis will cause a proportionate movement of the lever mem her and the consequent indication by movement of indicator disk 18. As the instru ment is moved about the work axis, oneor another of the scales 21 will be directly visible at alltimes to the operator, so that the test maybe accurately followed and the location of the work accomplished with precision and speed. 7 a

Having thus described and shown what I now believe to be the best embodiment of my invention and one which has been put into successful practice, I am aware that the same is not'the only possible form,vand thatit may be modified and altered in various particulars without departing from the true and essentialscope of the invention which I intend to indicate in the following claims.

ciation with a guiding surface, an indicator .disk pivoted for rotation on an axis extending substantially at right angles to the pivotal axis of the lever, indicating portions carried by said disk and extending substantially parallel with and-on different sides of thepivotal axis of the disk, and there being indicia visibly associated with said indicating portions; said lever and said disk being operably associated latter is rotated upon oscillation of the former. V V V a 2. In aninstrument of the class described, the combination of a bodyfportion, means for mounting the body portion for revolution, the body p'ortion beingprovided with peripherally disposed graduation marks forming a scale, actuating means extending longitudinally of the body portion and' arranged at its outer extremityi for coo'jpera tion with a guiding surface, and an indieat portion and extending into coeperative association with the scale, there being operag tive connection between the actuating means and said indicating member whereby the latter is moved relative to the scale upon actuation of the former. a

ing member movably supported on thebody 3. An. instrume t of the class described,

the body portion, adjacent saidlast mentioned extremity andextending longitudinally of said body member into coeperatlve assoclatlon with the graduatlon marks thereon, and there being operative conneca tion between the actuating means andsaid indicating members whereby the latt'er are moved relative to the scales upon actuation of the former. V i a j I a A 4. An instrument of the class described comprising a body member of general frusto-conical form, actuating means mounted whereby the thereonand arranged adjacent the outer extremity of said body member for cooperaa tion with a guiding surface, the lateral surface of the body member adjacent'its other extremity being provided with graduation marks formmgscales peripherally disposed on difi'erentsides of the axis ofthe body" member, and indicating members movably mounted on the body portionand arranged for association with graduation a on difierent sides of the axis of the latter, there being operative connection between said intion of the latter.

5. An instrument of the class described including a body member of general tubular form, an indicator disk mounted at one extremity thereof and upon the longitudinal ing means mounted revoluble substantially axis thereof, actuaton the body member and extending longitudinally thereof, the outer extremity of face exterior of the b0 Copies of this patent may be obtained for five cents each, by addressing the said actuating means being adapted for cooperatlon with a guiding surdy member and the inner extremity of said guiding means having operative connection with the indicator disk, the body member being provided with graduation marks peripherally disposed on the outer surface thereof adjacent the indicator disk, and there being indicating members carried by the indicator disk and movable therewith in cooperative association with the graduation marks on diflerent sides of the axis of the body member.

In testimony whereof I hereunto aflix my signature this 19th day of February, 1917. JOSEPH SCHWEISS.

Gommissioner of Patents,

Washington, D. C. 

